Blue is a 2002 Japanese romantic drama directed by Hiroshi Ando based on the manga of the same name by Kiriko Nananan. The film stars Mikako Ichikawa as Kayako Kirishima and Manami Konishi as Masami Endo. The film was first shown at the Toronto International Film Festival in 2002, and was released in Japanese theaters in 2003.

The film is about two teenage girls, Kayako Kirishima and Masami Endō, who find their friendship turning into something more.